RNA definition type in user preference > input , how can I change this?
The RNA value comes from the operator named above. Were you have entered "rotate view" needs to be the name of the operator to be run when the key/mouse combination is pressed. The standard operator to rotate the view would be view3d.rotate.

To get the value of a custom operator, you need to use the value of bl_idname defined in the operator you wish to use.

Some operators will have other properties that can be set as well -



This appears a little misleading as the options appear disabled, when in fact that shows they are default values, changing the values highlights them and shows an 'X' to return to default values.